141 static int get_scl_gpio_value(struct i2c_adapter *adap)  in get_scl_gpio_value()  argument
143 	return gpiod_get_value_cansleep(adap->bus_recovery_info->scl_gpiod);  in get_scl_gpio_value()
146 static void set_scl_gpio_value(struct i2c_adapter *adap, int val)  in set_scl_gpio_value()  argument
148 	gpiod_set_value_cansleep(adap->bus_recovery_info->scl_gpiod, val);  in set_scl_gpio_value()
151 static int get_sda_gpio_value(struct i2c_adapter *adap)  in get_sda_gpio_value()  argument
153 	return gpiod_get_value_cansleep(adap->bus_recovery_info->sda_gpiod);  in get_sda_gpio_value()
156 static void set_sda_gpio_value(struct i2c_adapter *adap, int val)  in set_sda_gpio_value()  argument
158 	gpiod_set_value_cansleep(adap->bus_recovery_info->sda_gpiod, val);  in set_sda_gpio_value()
161 static int i2c_generic_bus_free(struct i2c_adapter *adap)  in i2c_generic_bus_free()  argument
163 	struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;  in i2c_generic_bus_free()
167 		ret = bri->get_bus_free(adap);  in i2c_generic_bus_free()
169 		ret = bri->get_sda(adap);  in i2c_generic_bus_free()
185 int i2c_generic_scl_recovery(struct i2c_adapter *adap)  in i2c_generic_scl_recovery()  argument
187 	struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;  in i2c_generic_scl_recovery()
191 		bri->prepare_recovery(adap);  in i2c_generic_scl_recovery()
199 	bri->set_scl(adap, scl);  in i2c_generic_scl_recovery()
202 		bri->set_sda(adap, scl);  in i2c_generic_scl_recovery()
211 			if (!bri->get_scl(adap)) {  in i2c_generic_scl_recovery()
212 				dev_err(&adap->dev,  in i2c_generic_scl_recovery()
220 		bri->set_scl(adap, scl);  in i2c_generic_scl_recovery()
224 			bri->set_sda(adap, scl);  in i2c_generic_scl_recovery()
228 			ret = i2c_generic_bus_free(adap);  in i2c_generic_scl_recovery()
239 		bri->unprepare_recovery(adap);  in i2c_generic_scl_recovery()
245 int i2c_recover_bus(struct i2c_adapter *adap)  in i2c_recover_bus()  argument
247 	if (!adap->bus_recovery_info)  in i2c_recover_bus()
250 	dev_dbg(&adap->dev, "Trying i2c bus recovery\n");  in i2c_recover_bus()
251 	return adap->bus_recovery_info->recover_bus(adap);  in i2c_recover_bus()
255 static void i2c_init_recovery(struct i2c_adapter *adap)  in i2c_init_recovery()  argument
257 	struct i2c_bus_recovery_info *bri = adap->bus_recovery_info;  in i2c_init_recovery()
294 	dev_err(&adap->dev, "Not using recovery: %s\n", err_str);  in i2c_init_recovery()
295 	adap->bus_recovery_info = NULL;  in i2c_init_recovery()
300 	struct i2c_adapter *adap = client->adapter;  in i2c_smbus_host_notify_to_irq()  local
303 	if (!adap->host_notify_domain)  in i2c_smbus_host_notify_to_irq()
309 	irq = irq_find_mapping(adap->host_notify_domain, client->addr);  in i2c_smbus_host_notify_to_irq()
311 		irq = irq_create_mapping(adap->host_notify_domain,  in i2c_smbus_host_notify_to_irq()
667 static void i2c_dev_set_name(struct i2c_adapter *adap,  in i2c_dev_set_name()  argument
683 	dev_set_name(&client->dev, "%d-%04x", i2c_adapter_id(adap),  in i2c_dev_set_name()
730 i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info)  in i2c_new_device()  argument
739 	client->adapter = adap;  in i2c_new_device()
754 		dev_err(&adap->dev, "Invalid %d-bit I2C address 0x%02hx\n",  in i2c_new_device()
760 	status = i2c_check_addr_busy(adap, i2c_encode_flags_to_addr(client));  in i2c_new_device()
770 	i2c_dev_set_name(adap, client, info);  in i2c_new_device()
775 			dev_err(&adap->dev,  in i2c_new_device()
786 	dev_dbg(&adap->dev, "client [%s] registered with bus id %s\n",  in i2c_new_device()
797 	dev_err(&adap->dev,  in i2c_new_device()
927 	struct i2c_adapter *adap = to_i2c_adapter(dev);  in i2c_adapter_dev_release()  local
928 	complete(&adap->dev_released);  in i2c_adapter_dev_release()
959 	struct i2c_adapter *adap = to_i2c_adapter(dev);  in i2c_sysfs_new_device()  local
999 	client = i2c_new_device(adap, &info);  in i2c_sysfs_new_device()
1004 	mutex_lock(&adap->userspace_clients_lock);  in i2c_sysfs_new_device()
1005 	list_add_tail(&client->detected, &adap->userspace_clients);  in i2c_sysfs_new_device()
1006 	mutex_unlock(&adap->userspace_clients_lock);  in i2c_sysfs_new_device()
1027 	struct i2c_adapter *adap = to_i2c_adapter(dev);  in i2c_sysfs_delete_device()  local
1046 	mutex_lock_nested(&adap->userspace_clients_lock,  in i2c_sysfs_delete_device()
1047 			  i2c_adapter_depth(adap));  in i2c_sysfs_delete_device()
1048 	list_for_each_entry_safe(client, next, &adap->userspace_clients,  in i2c_sysfs_delete_device()
1060 	mutex_unlock(&adap->userspace_clients_lock);  in i2c_sysfs_delete_device()
1122 			      struct i2c_adapter *adap)  in i2c_do_add_adapter()  argument
1125 	i2c_detect(adap, driver);  in i2c_do_add_adapter()
1141 static void i2c_host_notify_irq_teardown(struct i2c_adapter *adap)  in i2c_host_notify_irq_teardown()  argument
1143 	struct irq_domain *domain = adap->host_notify_domain;  in i2c_host_notify_irq_teardown()
1153 	adap->host_notify_domain = NULL;  in i2c_host_notify_irq_teardown()
1169 static int i2c_setup_host_notify_irq_domain(struct i2c_adapter *adap)  in i2c_setup_host_notify_irq_domain()  argument
1173 	if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_HOST_NOTIFY))  in i2c_setup_host_notify_irq_domain()
1176 	domain = irq_domain_create_linear(adap->dev.fwnode,  in i2c_setup_host_notify_irq_domain()
1178 					  &i2c_host_notify_irq_ops, adap);  in i2c_setup_host_notify_irq_domain()
1182 	adap->host_notify_domain = domain;  in i2c_setup_host_notify_irq_domain()
1197 int i2c_handle_smbus_host_notify(struct i2c_adapter *adap, unsigned short addr)  in i2c_handle_smbus_host_notify()  argument
1201 	if (!adap)  in i2c_handle_smbus_host_notify()
1204 	irq = irq_find_mapping(adap->host_notify_domain, addr);  in i2c_handle_smbus_host_notify()
1214 static int i2c_register_adapter(struct i2c_adapter *adap)  in i2c_register_adapter()  argument
1225 	if (WARN(!adap->name[0], "i2c adapter has no name"))  in i2c_register_adapter()
1228 	if (!adap->algo) {  in i2c_register_adapter()
1229 		pr_err("adapter '%s': no algo supplied!\n", adap->name);  in i2c_register_adapter()
1233 	if (!adap->lock_ops)  in i2c_register_adapter()
1234 		adap->lock_ops = &i2c_adapter_lock_ops;  in i2c_register_adapter()
1236 	rt_mutex_init(&adap->bus_lock);  in i2c_register_adapter()
1237 	rt_mutex_init(&adap->mux_lock);  in i2c_register_adapter()
1238 	mutex_init(&adap->userspace_clients_lock);  in i2c_register_adapter()
1239 	INIT_LIST_HEAD(&adap->userspace_clients);  in i2c_register_adapter()
1242 	if (adap->timeout == 0)  in i2c_register_adapter()
1243 		adap->timeout = HZ;  in i2c_register_adapter()
1246 	res = i2c_setup_host_notify_irq_domain(adap);  in i2c_register_adapter()
1249 		       adap->name, res);  in i2c_register_adapter()
1253 	dev_set_name(&adap->dev, "i2c-%d", adap->nr);  in i2c_register_adapter()
1254 	adap->dev.bus = &i2c_bus_type;  in i2c_register_adapter()
1255 	adap->dev.type = &i2c_adapter_type;  in i2c_register_adapter()
1256 	res = device_register(&adap->dev);  in i2c_register_adapter()
1258 		pr_err("adapter '%s': can't register device (%d)\n", adap->name, res);  in i2c_register_adapter()
1262 	res = of_i2c_setup_smbus_alert(adap);  in i2c_register_adapter()
1266 	dev_dbg(&adap->dev, "adapter [%s] registered\n", adap->name);  in i2c_register_adapter()
1268 	pm_runtime_no_callbacks(&adap->dev);  in i2c_register_adapter()
1269 	pm_suspend_ignore_children(&adap->dev, true);  in i2c_register_adapter()
1270 	pm_runtime_enable(&adap->dev);  in i2c_register_adapter()
1273 	res = class_compat_create_link(i2c_adapter_compat_class, &adap->dev,  in i2c_register_adapter()
1274 				       adap->dev.parent);  in i2c_register_adapter()
1276 		dev_warn(&adap->dev,  in i2c_register_adapter()
1280 	i2c_init_recovery(adap);  in i2c_register_adapter()
1283 	of_i2c_register_devices(adap);  in i2c_register_adapter()
1284 	i2c_acpi_register_devices(adap);  in i2c_register_adapter()
1285 	i2c_acpi_install_space_handler(adap);  in i2c_register_adapter()
1287 	if (adap->nr < __i2c_first_dynamic_bus_num)  in i2c_register_adapter()
1288 		i2c_scan_static_board_info(adap);  in i2c_register_adapter()
1292 	bus_for_each_drv(&i2c_bus_type, NULL, adap, __process_new_adapter);  in i2c_register_adapter()
1298 	init_completion(&adap->dev_released);  in i2c_register_adapter()
1299 	device_unregister(&adap->dev);  in i2c_register_adapter()
1300 	wait_for_completion(&adap->dev_released);  in i2c_register_adapter()
1303 	idr_remove(&i2c_adapter_idr, adap->nr);  in i2c_register_adapter()
1315 static int __i2c_add_numbered_adapter(struct i2c_adapter *adap)  in __i2c_add_numbered_adapter()  argument
1320 	id = idr_alloc(&i2c_adapter_idr, adap, adap->nr, adap->nr + 1, GFP_KERNEL);  in __i2c_add_numbered_adapter()
1325 	return i2c_register_adapter(adap);  in __i2c_add_numbered_adapter()
1391 int i2c_add_numbered_adapter(struct i2c_adapter *adap)  in i2c_add_numbered_adapter()  argument
1393 	if (adap->nr == -1) /* -1 means dynamically assign bus id */  in i2c_add_numbered_adapter()
1394 		return i2c_add_adapter(adap);  in i2c_add_numbered_adapter()
1396 	return __i2c_add_numbered_adapter(adap);  in i2c_add_numbered_adapter()
1446 void i2c_del_adapter(struct i2c_adapter *adap)  in i2c_del_adapter()  argument
1453 	found = idr_find(&i2c_adapter_idr, adap->nr);  in i2c_del_adapter()
1455 	if (found != adap) {  in i2c_del_adapter()
1456 		pr_debug("attempting to delete unregistered adapter [%s]\n", adap->name);  in i2c_del_adapter()
1460 	i2c_acpi_remove_space_handler(adap);  in i2c_del_adapter()
1463 	bus_for_each_drv(&i2c_bus_type, NULL, adap,  in i2c_del_adapter()
1468 	mutex_lock_nested(&adap->userspace_clients_lock,  in i2c_del_adapter()
1469 			  i2c_adapter_depth(adap));  in i2c_del_adapter()
1470 	list_for_each_entry_safe(client, next, &adap->userspace_clients,  in i2c_del_adapter()
1472 		dev_dbg(&adap->dev, "Removing %s at 0x%x\n", client->name,  in i2c_del_adapter()
1477 	mutex_unlock(&adap->userspace_clients_lock);  in i2c_del_adapter()
1484 	device_for_each_child(&adap->dev, NULL, __unregister_client);  in i2c_del_adapter()
1485 	device_for_each_child(&adap->dev, NULL, __unregister_dummy);  in i2c_del_adapter()
1488 	class_compat_remove_link(i2c_adapter_compat_class, &adap->dev,  in i2c_del_adapter()
1489 				 adap->dev.parent);  in i2c_del_adapter()
1493 	dev_dbg(&adap->dev, "adapter [%s] unregistered\n", adap->name);  in i2c_del_adapter()
1495 	pm_runtime_disable(&adap->dev);  in i2c_del_adapter()
1497 	i2c_host_notify_irq_teardown(adap);  in i2c_del_adapter()
1506 	init_completion(&adap->dev_released);  in i2c_del_adapter()
1507 	device_unregister(&adap->dev);  in i2c_del_adapter()
1508 	wait_for_completion(&adap->dev_released);  in i2c_del_adapter()
1512 	idr_remove(&i2c_adapter_idr, adap->nr);  in i2c_del_adapter()
1517 	memset(&adap->dev, 0, sizeof(adap->dev));  in i2c_del_adapter()
1705 void i2c_clients_command(struct i2c_adapter *adap, unsigned int cmd, void *arg)  in i2c_clients_command()  argument
1711 	device_for_each_child(&adap->dev, &cmd_arg, i2c_cmd);  in i2c_clients_command()
1788 static int i2c_quirk_error(struct i2c_adapter *adap, struct i2c_msg *msg, char *err_msg)  in i2c_quirk_error()  argument
1790 	dev_err_ratelimited(&adap->dev, "adapter quirk: %s (addr 0x%04x, size %u, %s)\n",  in i2c_quirk_error()
1796 static int i2c_check_for_quirks(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)  in i2c_check_for_quirks()  argument
1798 	const struct i2c_adapter_quirks *q = adap->quirks;  in i2c_check_for_quirks()
1808 				return i2c_quirk_error(adap, &msgs[0], "1st comb msg must be write");  in i2c_check_for_quirks()
1811 				return i2c_quirk_error(adap, &msgs[1], "2nd comb msg must be read");  in i2c_check_for_quirks()
1814 				return i2c_quirk_error(adap, &msgs[0], "comb msg only to same addr");  in i2c_check_for_quirks()
1817 				return i2c_quirk_error(adap, &msgs[0], "msg too long");  in i2c_check_for_quirks()
1820 				return i2c_quirk_error(adap, &msgs[1], "msg too long");  in i2c_check_for_quirks()
1827 		return i2c_quirk_error(adap, &msgs[0], "too many messages");  in i2c_check_for_quirks()
1834 				return i2c_quirk_error(adap, &msgs[i], "msg too long");  in i2c_check_for_quirks()
1837 				return i2c_quirk_error(adap, &msgs[i], "no zero length");  in i2c_check_for_quirks()
1840 				return i2c_quirk_error(adap, &msgs[i], "msg too long");  in i2c_check_for_quirks()
1843 				return i2c_quirk_error(adap, &msgs[i], "no zero length");  in i2c_check_for_quirks()
1862 int __i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)  in __i2c_transfer()  argument
1870 	if (adap->quirks && i2c_check_for_quirks(adap, msgs, num))  in __i2c_transfer()
1882 				trace_i2c_read(adap, &msgs[i], i);  in __i2c_transfer()
1884 				trace_i2c_write(adap, &msgs[i], i);  in __i2c_transfer()
1889 	for (ret = 0, try = 0; try <= adap->retries; try++) {  in __i2c_transfer()
1890 		ret = adap->algo->master_xfer(adap, msgs, num);  in __i2c_transfer()
1893 		if (time_after(jiffies, orig_jiffies + adap->timeout))  in __i2c_transfer()
1901 				trace_i2c_reply(adap, &msgs[i], i);  in __i2c_transfer()
1902 		trace_i2c_result(adap, num, ret);  in __i2c_transfer()
1921 int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)  in i2c_transfer()  argument
1942 	if (adap->algo->master_xfer) {  in i2c_transfer()
1945 			dev_dbg(&adap->dev,  in i2c_transfer()
1954 			ret = i2c_trylock_bus(adap, I2C_LOCK_SEGMENT);  in i2c_transfer()
1959 			i2c_lock_bus(adap, I2C_LOCK_SEGMENT);  in i2c_transfer()
1962 		ret = __i2c_transfer(adap, msgs, num);  in i2c_transfer()
1963 		i2c_unlock_bus(adap, I2C_LOCK_SEGMENT);  in i2c_transfer()
1967 		dev_dbg(&adap->dev, "I2C level transfers not supported\n");  in i2c_transfer()
2014 	struct i2c_adapter *adap = client->adapter;  in i2c_get_device_id()  local
2018 	if (!i2c_check_functionality(adap, I2C_FUNC_SMBUS_READ_I2C_BLOCK))  in i2c_get_device_id()
2022 	ret = i2c_smbus_xfer(adap, I2C_ADDR_DEVICE_ID, 0,  in i2c_get_device_id()
2053 static int i2c_default_probe(struct i2c_adapter *adap, unsigned short addr)  in i2c_default_probe()  argument
2059 	if (addr == 0x73 && (adap->class & I2C_CLASS_HWMON)  in i2c_default_probe()
2060 	 && i2c_check_functionality(adap, I2C_FUNC_SMBUS_READ_BYTE_DATA))  in i2c_default_probe()
2061 		err = i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_READ, 0,  in i2c_default_probe()
2066 	 && i2c_check_functionality(adap, I2C_FUNC_SMBUS_QUICK))  in i2c_default_probe()
2067 		err = i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_WRITE, 0,  in i2c_default_probe()
2069 	else if (i2c_check_functionality(adap, I2C_FUNC_SMBUS_READ_BYTE))  in i2c_default_probe()
2070 		err = i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_READ, 0,  in i2c_default_probe()
2073 		dev_warn(&adap->dev, "No suitable probing method supported for address 0x%02X\n",  in i2c_default_probe()
2187 int i2c_probe_func_quick_read(struct i2c_adapter *adap, unsigned short addr)  in i2c_probe_func_quick_read()  argument
2189 	return i2c_smbus_xfer(adap, addr, 0, I2C_SMBUS_READ, 0,  in i2c_probe_func_quick_read()
2195 i2c_new_probed_device(struct i2c_adapter *adap,  in i2c_new_probed_device()  argument
2208 			dev_warn(&adap->dev, "Invalid 7-bit address 0x%02x\n",  in i2c_new_probed_device()
2214 		if (i2c_check_addr_busy(adap, addr_list[i])) {  in i2c_new_probed_device()
2215 			dev_dbg(&adap->dev,  in i2c_new_probed_device()
2222 		if (probe(adap, addr_list[i]))  in i2c_new_probed_device()
2227 		dev_dbg(&adap->dev, "Probing failed, no device found\n");  in i2c_new_probed_device()
2232 	return i2c_new_device(adap, info);  in i2c_new_probed_device()
2256 void i2c_put_adapter(struct i2c_adapter *adap)  in i2c_put_adapter()  argument
2258 	if (!adap)  in i2c_put_adapter()
2261 	put_device(&adap->dev);  in i2c_put_adapter()
2262 	module_put(adap->owner);  in i2c_put_adapter()